T61 Thermal Sensor and CPU Upgrade

Discussion in 'Lenovo' started by Rambler, May 4, 2008.

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  1. Rambler

    Rambler Notebook Consultant

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    Hi,

    I'm looking at upgrading my T7300 merom to a T9300 penryn.

    From reading it seems that the T61 has two types of temperature sensors being an analogue one and a digital one.

    Newer penryn processors seem to use a digital thermal sensor and installing one of these into a T61 which has an analogue sensor throws a "thermal sensing error" message upon bootup. Also the latest 2.17 bios doesn't solve the issue.

    Has anyone had any experience with a similar CPU upgrade and is there anyway to tell what type of sensor you have?

    Thanks
     
  2. ZaZ

    ZaZ Super Model Super Moderator

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    Unless you have a specific need, I doubt it's worth the time or expense.
     
  3. Rambler

    Rambler Notebook Consultant

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    Anyone else?
     
  4. steve p

    steve p Notebook Evangelist

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    "Newer penryn processors seem to use a digital thermal sensor and installing one of these into a T61 which has an analogue sensor throws a "thermal sensing error" message upon bootup. Also the latest 2.17 bios doesn't solve the issue."

    How did you get this information? Did you install/have a Penryn CPU and are getting this error?
    The best way to find out if your board is compatible is to built one on line and see if the motherboard # is the same as yours.
     
  5. wb74160

    wb74160 Notebook Enthusiast

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    i tried actually this upgrapde on T61p from T7700 to T9300
    i get this sensor error on boot, and then the notebook stops completely
    reverted back to T7700 and everything fine
     
  6. steve p

    steve p Notebook Evangelist

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    Well!
    Do you have the latest BIOS?

    "The best way to find out if your board is compatible is to built one on line and see if the motherboard # is the same as yours"

    Did you try the above? From what I remember from when I upgraded my CPU the model number for my motherboard and the ones with the Penryn CPU was the same I think. If it is then the newest BIOS should do the trick. In any event please let us know what you found out I am very curious.
     
  7. Rambler

    Rambler Notebook Consultant

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    Ive done some research since my post.

    the ability to run a penryn based T8xxx or T9xxx CPU on your T61/p will depend on your motherboard and doesn't have anything to do with the BIOS.

    to start go to the IBM warranty page here http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=LOOK-WARNTY#sw and enter your type and serial number.

    You'll then get a page detailing each component in your system with a FRU number.

    Scroll down and look for 'SYSTEM PLANAR'. Mine states 42W7652 as the FRU.

    From my reviews of what people have got to work on their systems and the maintenance manual I've concluded the following.

    Merom based T7xxx CPU's will work on the following motherboards

    - 42W7651,
    - 42W7652,
    - 42W7653, and
    - 42W7875.

    Penyrn based T8xxx and T9xxx CPU's will work on the following motherboards

    - 42W7876, and
    - 42W7877.

    I hope this helps.
     
  8. twr7cx

    twr7cx Notebook Enthusiast

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    I've got an R61e with 42W7827 as the system planar. I fitted an X9000 CPU and keep getting the Thermal error. I think I'm therefore limited to the Merom based CPU's.

    EDIT: Just hit ESC and it works fine. Only downside is an annoiying beep on start up.
     
  9. VisualFeast

    VisualFeast Notebook Enthusiast

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    How about a 42W7867? Any info on that? (have the T8400 in it already)
     
  10. larryrheiniger

    larryrheiniger Newbie

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    I have a T61 6457 4JU and was told by several chip suppliers the X9000 would work so I bought one on e-bay and installed it last night and received the thermal error detected message and my machine shut down. I have upgraded my BIOS TO 2.1...
    Have you found a way to determine what thermal sensor, digital or analog a particular machine has, can it be found somewhere in the BIOS?
     
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